Malicious PDF — malware analysis report

Static analysis result for SHA-256 04ecb0bf76fa0377…

MALICIOUS

PDF

85.3 KB Created: 2021-06-25 23:21:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d99c81ac3e8ffb47f76415ec59a3949a SHA-1: 6cd54e9de1e09aa9bddba25f610a57d94f0d3d2a SHA-256: 04ecb0bf76fa037784bf618220ccc0746dceeb85811e77df99a0319d8e54e55a
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm with numerous URLs pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. ClamAV detected this file as Pdf.Phishing.Trojan, further supporting its malicious nature. The file's structure and the nature of the embedded links suggest it is designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier clean score 0.0115

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://bisnismedsos.com/userfiles/file/77102862384.pdf
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/4shg94kh97cdjg2m6b51mugm22/10904861916.pdf
    • http://analogsys.com/uploaded/file/199349315260aebc876b881.pdf
    • https://resonanceacteurs.nl/userfiles/file/vogogujuxapukuxowalu.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c201ce0c6b6---9804986940.pdf
    • https://agermag.ro/mm/file/wiletepoxujofudeberifunu.pdf
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/705a647cbc7086289fa0515d99bec13f/favimowirazulibed.pdf
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4c5dce437---fogosuravuj.pdf
    • https://betentour.com/sites/default/files/file/27690253830.pdf
    • http://poorclarescork.ie/images/33559406365.pdf
    • https://egf.tw/test2/images/file/rebivimenepebumomodi.pdf
    • http://aftckwt.com/uploads/file/54592199263.pdf
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607776f6a47c7---54525476295.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad0c71b3b7---30962411136.pdf
    • http://altelaw.com/uploads/image/file/41436563558.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16073d88fd4216---23591864597.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160852e8b0e19f---74298761513.pdf
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b745cd1aee1---vimuvafe.pdf
    • https://diedacorporation.net/freesiafiles/file/kijajadebelotaju.pdf
    • https://yellowstonewildlife.com/wajegabe.pdf
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082356b7a1e9---14392886018.pdf
    • http://wooshin.kr/uploaded/file/61168423560a4c12f8171d.pdf
    • http://innotec-industrie.be/userfiles/file/zinoligalezalewaguxo.pdf
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/da68s0ghuttccnrc5o2t4dgb45/52929954449.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=the+conjunction+fallacy
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef7b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7B 16792 bytes
font_01_sfnt_off00010792.bin
0b89b2e7bccfb9d12c59479450fb3afb463f729f1fc367de9b2a05fd0238443d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10792 10472 bytes
font_02_sfnt_off00011f4b.bin
74d34d1fa77876f4dfe9ae39d5d9b63df06f99e9439dd81bd4e7d790c2c830bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F4B 18608 bytes

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